<body>
  <div id="app">
    <hello></hello>
  </div>
</body>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="./lib/ping-ui-umd.js"></script>
<script>
  Vue.use(pingUi)
  new Vue({
    el: '#app'
  })
</script>